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Scientific Name | Dierama formosum Hilliard |
Higher Classification | Monocotyledons |
Family | IRIDACEAE |
National Status |
Status and Criteria | Least Concern |
Assessment Date | 2017/10/02 |
Assessor(s) | M. Lötter, J.E. Burrows & L. von Staden |
Justification | Dierama formosum has a localized distribution in South Africa (national EOO 2225 km²), but it is not threatened. Most subpopulations occur in protected areas. |
Distribution |
Endemism | Not endemic to South Africa |
Provincial distribution | Mpumalanga |
Range | This species has a disjunct distribution on the highlands of southern Africa. In South Africa, it is localized to the Mpumalanga Highveld around Dullstroom and Lydenburg. Further north, it also occurs on the eastern highlands of Zimbabwe and adjacent areas in Mozambique, as well as Mount Mulanje in Malawi. |
Habitat and Ecology |
Major system | Terrestrial |
Major habitats | Steenkampsberg Montane Grassland, Long Tom Pass Montane Grassland, Northern Escarpment Afromontane Fynbos, Northern Escarpment Quartzite Sourveld |
Description | It occurs in high altitude montane grassland, 1900-2200 m. |
Threats |
| A small proportion of the subpopulation on Mariepskop was lost to construction of telecommunications infrastructure (J.E. Burrows pers. comm.). A few subpopulations around Dullstroom are potentially threatened by habitat loss to development and competition from alien invasive plants, but overall, most of the Mpumalanga subpopulations occur within protected areas where they are not threatened. |
Population |
This species is sporadically encountered in high altitude grasslands (M. Lötter pers. comm. 2017). Subpopulations tend to be small (J.E. Burrows pers. comm. 2017). Although there has been sporadic declines in the past, the population is not currently suspected to be declining.
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Population trend | Stable |
Assessment History |
Taxon assessed |
Status and Criteria |
Citation/Red List version | | Dierama formosum Hilliard | Least Concern | Raimondo et al. (2009) | |
Bibliography |
Goldblatt, P. 1993. Iridaceae. In: G.V. Pope (ed). Flora Zambesiaca 12 (Part 4):1-102. Flora Zambesiaca Managing Committee, London.
Hilliard, O.M. and Burtt, B.L. 1988. Notes on some plants of Southern Africa chiefly from Natal: XIV. Notes from the Royal Botanic Garden Edinburgh 45(1):77-94.
Hilliard, O.M. and Burtt, B.L. 1991. Dierama: The hairbells of Africa. Acorn Books, Johannesburg and London.
Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.
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Citation |
| Lötter, M., Burrows, J.E. & von Staden, L. 2017. Dierama formosum Hilliard. National Assessment: Red List of South African Plants version . Accessed on 2025/04/14 |
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